A control method of controlling an emission direction of light emitted toward a display surface to be executed by a detection device configured to include an emission section and detect an irradiation position of the light includes the steps of determining whether or not the irradiation position of the light in the display surface is located in a target area, controlling the emission direction of the light to a direction of moving the irradiation position toward the target area when determining that the irradiation position is not located in the target area, and sets an amount of movement of the irradiation position toward the target area by control of the emission direction of the light larger when the irradiation position is located in a first region compared to when the irradiation position is located in a second region between the target area and the first region.